I posted it in another thread, but it's buried at the very last position.
Lots people are buying AR recently, so hopefully this info can save you some
money.
Here is the original link:http://sigforum.com/eve/forums/a/tpc/f/630601935/m/4581079231?r=4581079231#4581079231
full list:
Lewis Machine & Tool:
LMT
Lauer
DS Arms
PWA
Eagle
Armalite
Knights Armament
Barrett
Continental Machine Tool:
Stag
Rock River Arms
High Standard
Noveske
Century (New)
Global Tactical
CLE
S&W
MGI
Wilson Tactical
Grenadi